This was inspired by the search for improvements to tip vortex drag among aircraft manufacturers; it wont solve that, but it flies very well, surprisingly fast, with precision
and dead stick stability.Great fun.

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This is the latest version of my yellow blade, higher aspect and wider span. One minute into first flight and off in a thermal.Very satisfying range of flight, good penetration on the glide and a long flat glide,exciting low sweeps and turns using some throttle elevator mix.